import java.io.*;
import java.util.*;


public class Code2{
    public static void main(String[] args){
        char[] arr = new char[100];
        String str1;
        Scanner in = new Scanner(System.in);
        str1 = in.nextLine();
        for(int i=0;i<str1.length();i++)
        {
            arr[i] = str1.charAt(i);
            if(arr[i]=='z'){
                arr[i] = 'a';
            }
            else{
                arr[i] += 1;
            }
            System.out.print(arr[i]);
        }
        System.out.print("\n");
    }
}